DTC U1119: Lost Communication with Object Recognition ECU (CAN): Description

with Lane keeping Assist System.

The driving support ECU uses the millimeter wave radar sensor and lane recognition camera sensor to detect obstacles in front of vehicle.

Because of the location of the lane recognition camera assembly, it is subject to high temperatures. If the lane recognition camera sensor assembly becomes too hot, the power source is shut down to protect the system. At that time CAN communication also stops. However, in order to inform the driving support ECU that CAN communication has not stopped because of a CAN communication error, on/off signals are periodically sent from the HITP terminal.

DTC Code	DTC Detection Condition	Trouble Area
U1119	When vehicle speed is 50 km/h (31 mph) or more with lane-keeping main switch is on, communication stop from lane recognition camera sensor to driving support ECU continues for 1 second or more	Lane recognition camera sensor CAN communication system Driving support ECU